Measurement of lepton differential distributions and the top quark mass in $$t\bar{t}$$ t t ¯ production in pp collisions at $$\sqrt{s}=8$$ s = 8 TeV with the ATLAS detector
M. AaboudFaculté des Sciences, Université Mohamed Premier and LPTPM, Oujda, MoroccoG. AadCPPM, Aix-Marseille Université and CNRS/IN2P3, Marseille, FranceB. AbbottHomer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK USAO. AbdinovInstitute of Physics, Azerbaijan Academy of Sciences, Baku, AzerbaijanB. AbeloosLAL, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, Orsay, FranceHaider AbidiDepartment of Physics, University of Toronto, Toronto, ON CanadaO. S. AbouZeidSanta Cruz Institute for Particle Physics, University of California Santa Cruz, Santa Cruz, CA USAN. L. AbrahamDepartment of Physics and Astronomy, University of Sussex, Brighton, UKH. AbramowiczRaymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv, IsraelH. AbreuDepartment of Physics, Technion: Israel Institute of Technology, Haifa, IsraelR. AbreuCenter for High Energy Physics, University of Oregon, Eugene, OR USAY. AbulaitiDepartment of Physics, Stockholm University, Stockholm, SwedenB. S. AcharyaICTP, Trieste, ItalyS. AdachiInternational Center for Elementary Particle Physics and Department of Physics, The University of Tokyo, Tokyo, JapanL. AdamczykFaculty of Physics and Applied Computer Science, AGH University of Science and Technology, Krakow, PolandJahred AdelmanDepartment of Physics, Northern Illinois University, DeKalb, IL USAM. AdersbergerFakultät für Physik, Ludwig-Maximilians-Universität München, Münich, GermanyTim AdyeParticle Physics Department, Rutherford Appleton Laboratory, Didcot, UKTony AffolderSanta Cruz Institute for Particle Physics, University of California Santa Cruz, Santa Cruz, CA USAY. AfikDepartment of Physics, Technion: Israel Institute of Technology, Haifa, IsraelT. Agatonović-JovinInstitute of Physics, University of Belgrade, Belgrade, SerbiaC. AgheorghieseiDepartment of Physics, Alexandru Ioan Cuza University of Iasi, Iasi, RomaniaJ. A. Aguilar–SaavedraDepartamento de Fisica Teorica y del Cosmos, Universidad de Granada, Granada, SpainS. AhlenDepartment of Physics, Boston University, Boston, MA USAF. AhmadovJoint Institute for Nuclear Research, JINR Dubna, Dubna, RussiaGiulio AielliDipartimento di Fisica, Università di Roma Tor Vergata, Rome, ItalyS. AkatsukaFaculty of Science, Kyoto University, Kyoto, JapanH. AkerstedtDepartment of Physics, Stockholm University, Stockholm, SwedenTorsten AkessonFysiska institutionen, Lunds universitet, Lund, SwedenE. AkilliDepartement de Physique Nucleaire et Corpusculaire, Université de Genève, Geneva, SwitzerlandAndrei AkimovP.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, RussiaGian Luigi AlberghiDipartimento di Fisica e Astronomia, Università di Bologna, Bologna, ItalyJ. AlbertDepartment of Physics and Astronomy, University of Victoria, Victoria, BC CanadaP. AlbicoccoINFN e Laboratori Nazionali di Frascati, Frascati, ItalyM. J. Alconada VerziniInstituto de Física La Plata, Universidad Nacional de La Plata and CONICET, La Plata, ArgentinaSara AlderweireldtNational Institute for Subatomic PhysicsM. AleksaCERN, Geneva, SwitzerlandI. N. AleksandrovJoint Institute for Nuclear Research, JINR Dubna, Dubna, RussiaC. AlexaHoria Hulubei National Institute of Physics and Nuclear Engineering, Bucharest, RomaniaG. AlexanderRaymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv, IsraelT. AlexopoulosPhysics Department, National Technical University of Athens, Zografou, GreeceMuhammad AlhroobHomer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK USABabar AliCzech Technical University in Prague, Praha, Czech RepublicM. AlievDipartimento di Matematica e Fisica, Università del Salento, Lecce, ItalyGianluca AlimontiINFN Sezione di Milano, Milan, ItalyJ. AlisonEnrico Fermi Institute, University of Chicago, Chicago, IL USAS. P. AlkireNevis Laboratory, Columbia University, Irvington, NY USAB. M. M. AllbrookeDepartment of Physics and Astronomy, University of Sussex, Brighton, UKB. AllenCenter for High Energy Physics, University of Oregon, Eugene, OR USAPhilip Patrick AllportSchool of Physics and Astronomy, University of Birmingham, Birmingham, UKA. AloisioDipartimento di Fisica, Università di Napoli, Naples, ItalyA. AlonsoNiels Bohr Institute, University of Copenhagen, Kobenhavn, DenmarkF. AlonsoInstituto de Física La Plata, Universidad Nacional de La Plata and CONICET, La Plata, ArgentinaCristiano AlpigianiDepartment of Physics, University of Washington, Seattle, WA USAA. A. AlshehriSUPA-School of Physics and Astronomy, University of Glasgow, Glasgow, UKM. I. AlstatyCPPM, Aix-Marseille Université and CNRS/IN2P3, Marseille, FranceB. Álvarez GonzálezCERN, Geneva, SwitzerlandD. Álvarez PiquerasInstituto de Fisica Corpuscular (IFIC), Centro Mixto Universidad de Valencia-CSIC, Valencia, SpainM. G. AlviggiDipartimento di Fisica, Università di Napoli, Naples, ItalyB. T. AmadioPhysics Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, CA USAY. Amaral CoutinhoUniversidade Federal do Rio De Janeiro COPPE/EE/IF, Rio de Janeiro, BrazilC. AmelungDepartment of Physics, Brandeis University, Waltham, MA USAD. AmideiDepartment of Physics, The University of Michigan, Ann Arbor, MI USAS. P. Amor Dos SantosDepartment of Physics, University of Coimbra, Coimbra, PortugalS. AmorosoCERN, Geneva, SwitzerlandG. AmundsenDepartment of Physics, Brandeis University, Waltham, MA USAChristos AnastopoulosDepartment of Physics and Astronomy, University of Sheffield, Sheffield, UKL. S. AncuDepartement de Physique Nucleaire et Corpusculaire, Université de Genève, Geneva, SwitzerlandN. AndariSchool of Physics and Astronomy, University of Birmingham, Birmingham, UKT. AndeenDepartment of Physics, The University of Texas at Austin, Austin, TX USAC. F. AndersPhysikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, GermanyJohn Kenneth AndersOliver Lodge Laboratory, University of Liverpool, Liverpool, UKK. J. AndersonEnrico Fermi Institute, University of Chicago, Chicago, IL USAA. AndreazzaDipartimento di Fisica, Università di Milano, Milan, ItalyV. AndreiKirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Heidelberg, GermanyS. AngelidakisUniversité Clermont Auvergne, CNRS/IN2P3, LPC, Clermont-Ferrand, FranceI. AngelozziNikhef National Institute for Subatomic Physics, University of Amsterdam, Amsterdam, The NetherlandsAaron AngeramiNevis Laboratory, Columbia University, Irvington, NY USAAlexey AnisenkovBudker Institute of Nuclear Physics, SB RAS, Novosibirsk, RussiaN. AnjosInstitut de Física d'Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Barcelona, SpainAlberto AnnoviDipartimento di Fisica E. Fermi, Università di Pisa, Pisa, ItalyC. AntelKirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Heidelberg, GermanyM. AntonelliINFN e Laboratori Nazionali di Frascati, Frascati, ItalyA. AntonovNational Research Nuclear University MEPhI, Moscow, RussiaD. J. A. AntrimDepartment of Physics and Astronomy, University of California Irvine, Irvine, CA USAF. AnulliINFN Sezione di Roma, Rome, ItalyMasato AokiKEK, High Energy Accelerator Research Organization, Tsukuba, JapanL. Aperio BellaCERN, Geneva, SwitzerlandG. ArabidzeDepartment of Physics and Astronomy, Michigan State University, East Lansing, MI USAY. AraiKEK, High Energy Accelerator Research Organization, Tsukuba, JapanJ. P. AraqueLaboratório de Instrumentação e Física Experimental de Partículas-LIP, Lisbon, PortugalV. Araujo FerrazUniversidade Federal do Rio De Janeiro COPPE/EE/IF, Rio de Janeiro, BrazilA. T. H. ArceDepartment of Physics, Duke University, Durham, NC USAR. E. ArdellDepartment of Physics, Royal Holloway University of London, Surrey, UKFrancisco Anuar ArduhInstituto de Física La Plata, Universidad Nacional de La Plata and CONICET, La Plata, ArgentinaJ-F. ArguinGroup of Particle Physics, University of Montreal, Montreal, QC CanadaS. ArgyropoulosUniversity of Iowa, Iowa City, IA USAM. ArikDepartment of Physics, Bogazici University, Istanbul, TurkeyA. J. ArmbrusterCERN, Geneva, SwitzerlandL. J. ArmitageSchool of Physics and Astronomy, Queen Mary University of London, London, UK
2017en
ABI
Аннотация
This paper presents single lepton and dilepton kinematic distributions measured in dileptonic t t events produced in 20.2 fb -1 of s = 8 TeV pp collisions recorded by the ATLAS experiment at the LHC. Both absolute and normalised differential cross-sections are measured, using events with an opposite-charge e pair and one or two btagged jets. The cross-sections are measured in a fiducial region corresponding to the detector acceptance for leptons, and are compared to the predictions from a variety of Monte Carlo event generators, as well as fixed-order QCD calculations, exploring the sensitivity of the cross-sections to the gluon parton distribution function. Some of the distributions are also sensitive to the top quark pole mass; a combined fit of NLO fixed-order predictions to all the measured distributions yields a top quark mass value of m pole t = 173.2 0.9 0.8 1.2 GeV, where the three uncertainties arise from data statistics, experimental systematics, and theoretical sources.
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